Support our efforts to keep these classic free-flight varios alive. Over the last few years, since obtaining the rights to the source code from the original developer, we added new features (like the WGS84 distance calculation required for FAI category 1 competitions), overcame technical limitations (like the GSP date roll-over), fixed numerous bugs and made improvements to the user interface. We intend to continue doing so, and your contribution helps us with that. Thank you!